Security Update for Microsoft ASP.NET Core (DoS) (August 2020)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(139496);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/05");

  script_cve_id("CVE-2020-1597");
  script_xref(name:"IAVA", value:"2020-A-0354-S");
  script_xref(name:"CEA-ID", value:"CEA-2020-0101");

  script_name(english:"Security Update for Microsoft ASP.NET Core (DoS) (August 2020)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft ASP.NET Core installations on the remote host contain vulnerable packages.");
  script_set_attribute(attribute:"description", value:
"The Microsoft ASP.NET Core installation on the remote host is version 2.1.x < 2.1.21, or 3.1.x < 3.1.7. It is,
therefore, affected by a denial of service (DoS) vulnerability when ASP.NET Core improperly handles web requests. An
unauthenticated, remote attacker can exploit this issue, via sending a specially crafted requests to the ASP.NET Core
application to cause the application to stop responding.");
  script_set_attribute(attribute:"see_also", value:"https://dotnet.microsoft.com/download/dotnet-core/2.1");
  script_set_attribute(attribute:"see_also", value:"https://dotnet.microsoft.com/download/dotnet-core/3.1");
  script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/162");
  # https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1597
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e208efc4");
  script_set_attribute(attribute:"solution", value:
"Update ASP.NET Core, remove vulnerable packages and refer to vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-1597");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/08/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/08/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/08/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:asp.net_core");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows");

  script_copyright(english:"This script is Copyright (C) 2020-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("microsoft_asp_dotnet_core_win.nbin");
  script_require_keys("installed_sw/ASP .NET Core Windows");
  script_require_ports(139, 445);

  exit(0);
}

include('vcf.inc');

app = 'ASP .NET Core Windows';
app_info = vcf::get_app_info(app:app, win_local:TRUE);

constraints = [
  { 'min_version' : '3.1', 'fixed_version' : '3.1.7'},
  { 'min_version' : '2.1', 'fixed_version' : '2.1.21'}
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);